METHOD FOR ACCESSING INFORMATION ON OBJECT HAVING TAG, LOCAL SERVER, ONS PROXY, PROGRAM, TAG CREATION METHOD, DEVICE HAVING TAG WRITER, TAG, AND PROGRAM FOR CONTROLLING DEVICE HAVING TAG WRITER

摘要

The invention provides a method for accessing information on an article with a tag attached thereon, the method making it possible to prevent information on article worn by an individual from being grasped with a tag reader installed in a public space, without sacrificing traceability and without involving much increase in cost, a local server, an ONS proxy, a program, a tag creation method, a tag writer and a tag writer control program. According to the invention, there is provided a method for providing access to information on articles associated with tags in a network system including a local server, an ONS proxy, an ONS server and at least one PML server, the method comprising the steps of: the local server reading, by using a tag reader connected to the local server, the data stored in a tag including at least one encrypted virtual ID; the local server sending an ONS service request including the virtual ID to the ONS proxy; the ONS proxy acquiring an article ID by decrypting the virtual ID by use of a key K; the ONS proxy generating, by using the article ID, a network address request for acquiring the network address of a PML server in which the information on article associated with the tag is stored, to send the request to the ONS server; the local server receiving the network address of a PML server which the ONS server has returned in response to the network address request; the local server sending, by using the network address of a PML server, a PML service request including the virtual ID to the PML server; and the PML server providing access to the information on article associated with the tag, which has been specified with the article ID acquired by decrypting the virtual ID by use of the key K, for the local server.